CN1522358A - Evaporative hydrophilic surface for a heat exchanger, method of making the same and composition therefor - Google Patents
Evaporative hydrophilic surface for a heat exchanger, method of making the same and composition therefor Download PDFInfo
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- CN1522358A CN1522358A CNA038005638A CN03800563A CN1522358A CN 1522358 A CN1522358 A CN 1522358A CN A038005638 A CNA038005638 A CN A038005638A CN 03800563 A CN03800563 A CN 03800563A CN 1522358 A CN1522358 A CN 1522358A
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- heat
- exchange fluid
- chromium
- flow channel
- particulate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0043—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for fuel cells
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2245/00—Coatings; Surface treatments
- F28F2245/02—Coatings; Surface treatments hydrophilic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
Abstract
A heat exchanger/evaporator for transferring heat from a first heat exchange fluid to a liquid to be evaporated into a gaseous second heat exchange fluid that includes a thermally conductive element 30 separating a first flow path 34 for the first heat exchange fluid and a second flow path 36 for the second heat exchange fluid. A first surface is on the element 30 in heat exchange relation with the first flow path 34 and a second surface is on the element 30 opposite the first surface and is in heat exchange relation with the second flow path 36. A hydrophilic coating 50 is bonded on part of the second surface and includes a powder of nominally spherically shaped particles including nickel, chromium, aluminum, cobalt and yttrium oxide bonded together with a braze metal predominantly made up of nickel, chromium and silicon and diffused into the nominally spherically shaped particles and the second surface. Also disclosed is a composition useful in forming a hydrophilic surface and a method of making a heat exchanger/evaporator.
Description
Technical field
The present invention relates to heat exchanger, more specifically, relate to a kind of in heat exchanger, use so that the water-wetted surface of improved evaporation effect to be provided.The present invention also relates to make the composition of water-wetted surface and the method for making heat exchanger.
Background technology
Evaporimeter has polytype and size.In a type of evaporimeter, the liquid of first heat-exchange fluid and a kind of air-flow that will be evaporated forms heat transfer relation.The purpose that such heat exchanger can be used to heat need comprise the humid gas of air at that.As just example, an example that needs this type humidifier is in PEM type fuel cell system.In many these type systematics, the gas that is rich in hydrogen is provided to the fuel cell of being separated anode and cathode side by barrier film with the oxygen containing gas of richness.Operation the most efficiently requires its fuel and oxidant to be supplied in a certain temperature or above this temperature.It also requires fuel and oxidant with specific relative humidity supply, can avoid the infringement to barrier film like this, for example becomes dry.
Thereby such heat exchanger need evaporate an aqueous materials, to reach the humidity level of expectation in constituting the gas stream of hydrogen rich stream and/or oxygen-enriched stream.They also can be used to improve the temperature of air-flow, therefore produce best fuel cell efficiency.
In many cases, in the fuel cell system of paying close attention to its size and weight, the size and the weight of expectation heat exchanger can minimize especially.This is real, for example in the vehicle application that fuel cell system is used for draw purpose.Yet, be difficult to not sacrifice the size that dewing efficient or dewing uniformity just minimize heat exchanger in many cases.
The present invention is intended to overcome above-mentioned one or more problems.
Summary of the invention
Main purpose of the present invention is to provide a kind of new improvement heat exchanger, especially but must not be used for a kind of waterborne liquid, is used for liquid is evaporated to gaseous fluid.Main purpose of the present invention also is to provide a kind of composition, and it is used to be configured in and forms water-wetted surface on the evaporative heat transfer surface.Another main purpose of the present invention is to provide a kind of new modification method of making heat exchanger, and this heat exchanger comprises an evaporative heat transfer surface.
According to a first aspect of the invention, heat exchanger/evaporation constructed in accordance comprises a heat conducting element, it is separated out first flow channel that is used for first heat-exchange fluid and second flow channel that is used for second heat-exchange fluid, and second heat-exchange fluid is gas normally.First surface is positioned at first tunnel-shaped that flows to become on the element that heat transmission gets in touch, and second surface is positioned at relative with first surface and forms on the element that hot transmission gets in touch with second flow channel.The hydrophilic coating that bonds to the small part at second surface, this coating is by the powder constituent of nominal spheres particulate, comprise nickel, chromium, aluminium, cobalt and yittrium oxide, they are bonded to together by brazing metal, this brazing metal is mainly by nickel, chromium and silicon are formed, and are dispersed in nominal spheres particulate and the second surface to bond them together.The weight rate scope of nominal spheres particulate and brazing metal is approximately 2-3: 1.
In a preferred embodiment, weight rate is about 70: 30.
In a preferred embodiment, this element is an atresia element, and is bonded with a fin at relative first surface place.Second surface with water wetted material is positioned on the fin.
According to another aspect of the present invention, provide a kind of composition that forms water-wetted surface on the evaporative heat transfer surface that is used to be configured in.Said composition comprises the mixing of nominal spheres fine-particle powder, and the nominal spheres fine-particle powder comprises nickel, chromium, aluminium, cobalt and yittrium oxide and the braze metal powder of mainly being made up of nickel, chromium and silicon.The weight rate scope of nominal spheres particulate and braze metal powder is approximately 2-3: 1.Also comprise volatility (Volatizable) organic bond in composition, its temperature in enough high energy fusing braze metal powder is volatilized and can not stayed residue basically.
In a preferred embodiment, adhesive is based on acrylic acid series or polypropylene carbonic ester.
Still according to a further aspect in the invention, provide a kind of manufacturing to comprise the method for the heat exchanger of a vapo(u)rability heat transfer surface, comprise heat exchanger core assembly of a step (a) combination in this method step, this core component has at least two flow channels, be used for first flow channel and second flow channel that is used for gaseous second heat exchange fluid of first heat-exchange fluid, a kind of liquid will be evaporated to described second heat-exchange fluid.This core component comprises a plurality of adjacent to each other but unconnected metal assemblies.Before or after step (a) is carried out, the method comprising the steps of (b), be coated with the last layer composition at least one assembly towards second flow channel, said composition comprises the nominal spheres fine-particle powder, braze metal powder and volatility organic bond, this nominal spheres fine-particle powder comprises nickel, chromium, aluminium, cobalt and yittrium oxide, this braze metal powder mainly is made up of nickel, chromium and silicon, and this volatility organic bond melts the temperature volatilization of braze metal powder and can not stay residue basically at enough high energy.The weight rate scope of this nominal spheres particulate and braze metal powder is approximately 2-3: 1.Comprise also that step (c) places core component under the soldering high temperature so that (i) fusing brazing metal and make it diffuse into nominal spheres particulate and this at least one metal assembly, the adhesive that (ii) volatilizees is also removed its all residue basically, and (iii) with the metal assembly soldering is a coupling unit.
Other purpose and advantage will become clearer from following explanation and in conjunction with relevant drawings.
Description of drawings
Fig. 1 is the schematic elevational view of heat exchanger constructed in accordance;
Fig. 2 is the amplification partial sectional view that is similar to along the heat exchanger core assembly of Fig. 1 center line 2-2;
Fig. 3 is the partial enlarged view of water-wetted surface on the assembly of this heat exchanger; And
Fig. 4 is a view that is similar to Fig. 3, but it has shown the water-wetted surface on another assembly of heat exchanger.
The specific embodiment
The present invention and aforesaid several aspect thereof will frequently be described at this, with reference to as heat exchanger in fuel cell system to fuel stream or oxidant stream or both humidifications.Yet, should be appreciated that use of the present invention is not limited to fuel cell system.On the contrary, can be used in equally in some application like this, wherein a kind of heat-exchange fluid forms heat exchange with the second gaseous state heat-exchange fluid that is become by the liquid evaporation and gets in touch.In common situation, liquid is aqueous materials, and for example water is in the evaporation of gaseous fluid but the present invention can effectively be applied in non-aqueous feedstock conversion equally.Therefore, except what explain in the dependent claims, the present invention is not limited to aqueous materials and/or fuel cell system.
See Fig. 1 now, show a kind of according to heat exchanger of the present invention.This heat exchanger comprises a core component, refers to by 10 usually, and it is by a plurality of stacked plates, and fin and spacer bar constitute, and it will be described below.In the time of for example in being applied in fuel cell system, it can be made with the opposing corrosion by parts of stainless steel.
Diffuser 12 at core component 10 1 ends comprises that a reception will be by the inlet 14 of the gas of humidification.In the situation of fuel cell system, this gas can be fuel, more specifically say so and be rich in the air-flow of hydrogen, and also can be oxidant, the rich oxygen containing air-flow of more specifically saying so.In any case, in diffuser 12, provide a tubule 16 that ends at a nozzle 18.Aqueous materials is typically water in fuel cell system, injected fuel gas or the oxidant stream that enters diffuser 12 with evaporation and moistening input.
At the relative end of core component 10 and diffuser 12, a current collector 20 is installed, and the air-flow of dewing is transported to the point that uses or further handle.
Core component 10 comprises the inner flow passage that is used for heat-exchange fluid, and heat-exchange fluid can be liquid state or gaseous state, and this passage forms heat exchange with the flow channel that comprises the humid gas that is used for heat-exchange fluid and gets in touch.Arrow 22 has schematically shown an inlet for this reason, and arrow 24 has schematically shown an outlet.Preferably but not like this all the time, the fluid of heat is promptly discharged in flowing of first heat-exchange fluid in core component 10, will be against second flow of heat exchange fluid, and second heat-exchange fluid just will be by moistening gaseous state heat-exchange fluid.
See Fig. 2 now, the composition of core component 10 will be by detailed description.It comprises a plurality of in opposed side by spacer bar 32 isolated imperforate plates 30.This plate 30 is that first heat-exchange fluid and second heat-exchange fluid have defined the flow channel that replaces.As shown in Figure 2, the first flow of heat exchange fluid passage refers to by 34, and the second flow of heat exchange fluid passage refers to by 36.The flow direction of each is represented by arrow.
Suitable top cover is installed in diffuser 12 and the relative two ends of current collector 20 place's core components, as known in the art.
In the embodiment shown in Fig. 2, wherein second fluid flowing passage 36 comprises by moistening gaseous state heat-exchange fluid, and the heat exchange and the evaporation reinforcement of elongated serpentine fins 38 forms are provided.Thereby the relative peak 40 of fin 38 bonds to plate 30 by soldering and defines flow channel 36, particularly, is connected on plate 30 surfaces of flow channel 36.
The apparent surface of plate 30 is towards flow channel 34, and it can provide or not provide reinforcement as required.Reinforcement can comprise fin, perhaps tubular pocket or burr or the like, and these are known in the field.
In a preferred embodiment of the invention, plate 30 is equipped with water-wetted surface towards the surface of flow channel 36 or the surface or the both of the serpentine fins 38 in flow channel 36.Therefore, they are easy to the moistening and diffusion moisture by the water that enters with air-flow from nozzle 18, evenly pass passage 36 with liquid state simultaneously.Obtained sizable improvement with less relatively capacity to humidification.
Fig. 3 and 4 substantially the same, what represent except Fig. 3 is to be applied in 30 1 lip-deep water-wetted surfaces of plate, and Fig. 4 represents is the water-wetted surface that is applied on the fin 38, water-wetted surface is made of many common spherical particles 50 as can be seen, and all enough I that its size can be different but all usually are to be classified as powder.This spherical particle 50 is nominal spheres and need not be accurate sphere.Yet, can think the easier raising that reaches evaporation efficiency when real spherical.
In any case, particulate 50 is bonded to together by the brazing metal that is powder type equally.Brazing metal also is bonded to particulate 50 in the substrate, and according to circumstances, substrate is plate 30 or fin 38 just, perhaps both.Because the shape of particulate 50 exists many interconnected interstices 52 between particulate 50; These spaces provide hydrophily for coating.
A preferred form of nominal spheres particulate refers to the commercial ceramic/metal powder that can be obtained by Metco 461NS.Its major function composition comprises nickel, chromium, aluminium, cobalt and yittrium oxide.This raw material thinks to have following percentage by weight component: aluminium 5.5%, and cobalt 2.5%, yittrium oxide 0.5%, silicon 1.0%, manganese 2.0%, chromium 17.5%, iron 0.5%, nickel 67.0%, other are 3.5% years old.
That uses is soldered to particulate 50 mutually together and it is brazed to commercial can the acquisition by the BNi-5 brazing powder of braze metal powder on substrate 30 or 38, and it is thought and is made up of following component in percentage by weight: 19.0% chromium; 10.2% silicon; All the other are nickel except the spike raw material, and the spike raw material comprises cobalt, carbon, aluminium, titanium, zirconium, boron, phosphorus, sulphur, selenium, oxygen molecule and nitrogen molecular, and all these total amounts are 0.1% or still less.
Generally speaking, the ratio range between the percentage by weight of the percentage by weight of spherical particle 50 and braze metal powder is approximately 2-3: 1.Preferably select among the embodiment at one, spherical particle 50 is about 70: 30 with the weight rate of braze metal powder.Such an embodiment is contemplated to 69: 31 ratio.
Braze metal powder is activated in brazing temperature, and at each metal parts of this temperature core component 10, just metallic plate 30, and spacer bar 32 and fin 38 are soldered to together.Therefore, comprise spherical particle, the coating composition of braze metal powder and adhesive composition can be applied to metallic plate 30 towards passage 36 or fin 38 or both surfaces in its uncured state, in its uncured state, core 10 assemblies are placed in anchor clamps or the clamping device with attaching parts not in common mode then and keep together, and place under the brazing temperature then.For intensity that strengthens the soldering tie point and the uniformity that promotes stacked size, coating is removed or makes on its peak that is not coated in fin.Brazing temperature can be finished three functions then, promptly presses assembly relation braze welding of metal parts is arrived together, makes braze metal powder that spherical particle 50 is connected together and be connected to their substrate 30 and 38, and the binding agent that volatilizees.In normal conditions, fabulous bonding will be obtained, when fusing because braze metal powder can diffuse in particulate 50 and the substrate 30,38 and fabulous bonding is provided.In normal conditions, the composition of being determined by ceramic/metal powder and braze metal powder utilized organic binder bond to hold it in suprabasil appropriate location before soldering.Organic binder bond in the fusion temperature of braze metal powder or when being lower than this temperature slightly reality volatilize fully.Therefore, organic binder bond does not have residue, can not make the residue influence by particulate 50 and their definite hydrophilies that the slit provided.
In common situation, the target fin surface feeding quantity preferably be about 150-200 gram/square metre.Yet, also can allow higher feeding quantity.In some cases, the hydrophilicity according to expectation also can allow lower feeding quantity.
The expectation coating is used by impregnation technology always and is produced about 0.001 inch-0.0015 inch thickness with the both sides at fin.Expect that more coatings applications is optional (nonobtrusive) to water wet raw material and active gases by fin, that is to say that being less than 10% fin channels in a side is descended to reduce pressure on stifled by coating.
Also expect the peak of fin, promptly form the peak 40 of fin rightabout so that wave shaped radiator to be provided at batten, to assembly is optional, that is to say that this assembly is to be firmly bonded to adjacent plate 30 by metallurgy, to guarantee good heat-conductive characteristic between fin 38 and plate 30.This needs outer surface, and the convex surface at the peak 40 of fin 38 is coatings not fully in other words.
In order to obtain aforementioned purpose, fin section is weighed by degreasing and off-line.After this, this fin section immerses in the slurries that mix hydrophilic coating composition (metal/ceramic powder, braze metal powder and binding agent) continuously.From then on this fin section is taken out in the slurries then and is dried immediately.Blowing slight air-flow on this fin so that consistent distribution the on the degree of depth of slurries at this fin after this.After that, the peak of fin, just the top 40, more specifically are by wiped clean of slurry at its lateral surface.This can be realized by rag, perhaps can be realized by sand papering after slurries become dry if desired.
Suppose that the cleaning at before slurries become dry fin peak or top 40 finishes, this fin section is then 110 ℃ of oven dry and weighed to guarantee to have obtained the feeding quantity of expectation.
Aforesaid sequence of steps is in order to limit, and opposite, is in order openly to obtain the present invention's optimal mode of the coatings applications of expection at present.
Should be noted that in some cases slurries can be first-selected but flood by spraying or being rolled onto on the fin.
Organic binder bond is not crucial especially.Organic binder bond should use with enough quantity, so that can not lose adhesion before the final assembling of humidifier.Usually, the binder content that approximates coating composition gross weight 20-23% can reach this purpose.Simultaneously, binding agent should be complete thermal degradation, does not have residue in fact in relevant brazing temperature, is 600 ℃ to stainless steel structure for example.In addition, when coating is passed through immersion coating, the viscosity approximate extents of slurries 70 °F should be 2-3 centipoise (powder be suspended in the binding agent fully), like this so that when by immersion coating, obtain the powder feeding quantity of expectation, even have an opportunity to flow away from fin section at the dipping rear slurry.Certainly, when coating applies by other modes rather than pass through dipping, for example spray or roller coat, other viscosity also can be suitable.Acrylic acid series for example, the polypropylene carbonic ester, the raw material of propane diols monomethyl ether acetate (propyleneglycol monomethylether acetate) and other acetate and n-propyl bromide and their composition is suitable to binding agent usually.Binding agent based on acrylic acid series is first-selected.
The concrete weight rate that has been found that nominal spheres particulate 50 and braze metal powder is within above-mentioned scope, and is clearer and more definite, and the ratio at approximate 70: 30 provides the combination of perfect intensity and water-wet behavior.If to the composition use brazing metal still less of same weight, with obtaining stronger hydrophily, because the particulate 50 of greater number is arranged in coating.Yet the brazing metal of smaller amounts means that adhesion strength will reduce, according to using it to produce adverse influence to the life-span of heat exchanger.Opposite, when the ratio that is coated in the braze metal powder in the same weight combinations thing of given surf zone is risen, nominal spheres particulate 50 still less will be arranged, and hydrophily will be reduced slightly in final coating.Therefore, remarkable characteristic of the present invention be coating as whole portion parts of its substrate by permanent bond to substrate.In fact, have been found that before heat exchanger is put in substrate, to form coating and it is soldered to suprabasil example, can after applying water-wetted surface, not lose its an any adhesively heat exchange enhancing of formation structure, for example pit or burr in plate.In fact, in such a case, substrate itself may be broken before the water-wetted surface bonding loses.
On those characteristics that nominal spheres particulate 50 can be described in front some changes are arranged.They can form by gas atomization or other any methods that can produce small nominal spheres.Spherical size can not influence hydrophily especially, as long as particulate is enough little, 52 pairs in the slit that forms between the particulate 50 has capillary dimensions with evaporated liquid in heat exchanger.
The shape of braze metal powder particulate is unessential, because brazing metal fusing and actual dispersion enter in cermet particulate and the substrate as previously mentioned.
The basic standard that forms the raw material of particulate 50 is that its raw material to contact with it has decay resistance, with it Jie Chu raw material air-flow and with the liquid that is evaporated for example.This raw material also should keep the bonding and the water ability that can obtain and provide good in a period of time.The oxidation of particulate is not extremely expected.
The metal/ceramic powder adds that the concrete use of brazing metal expects very much, if because compare with the situation that replaces their to use by metal particle fully, and the more torpescence of nominal spheres particulate 50 performances.
From foregoing, be appreciated that the present invention can perfectly use in the various aspects of heat exchanger, comprise as heat exchanger,, and use in the method for making heat exchanger as the composition that water-wetted surface is provided in heat exchange or evaporative applications.
Claims (13)
1. one kind transmits heat to a kind of liquid so that this liquid is evaporated to the device of gaseous second heat exchange fluid from first heat-exchange fluid, comprising:
A heat conducting element, it is separated out first flow channel that is used for first heat-exchange fluid and second flow channel that is used for second heat-exchange fluid;
First surface, it becomes heat exchange relationship on described element and with the said first mobile tunnel-shaped;
Second surface, it forms heat exchange relationship on the element relative with said first surface and with said second flow channel; And
A hydrophilic coating, it is bonded on the part of said second surface at least, and constitute by the powder of nominal spheres particulate, this nominal spheres particulate comprises nickel, chromium, aluminium, cobalt and yittrium oxide, they are bonded to together by brazing metal, this brazing metal mainly is made of nickel, chromium and silicon, and this brazing metal diffuses in described nominal spheres particulate and the described second surface, and the weight rate scope of nominal spheres particulate and brazing metal is approximately 2-3: 1.
2. device as claimed in claim 1 is characterized in that said weight rate is about 70: 30.
3. device as claimed in claim 1 is characterized in that, said element is an atresia element, be bonded with a fin with said first surface opposite position, and said second surface is on said fin.
4. one kind is used for disposing the composition that forms water-wetted surface at the vapo(u)rability heat exchange surface, comprises following mixing:
A kind of powder of nominal spheres particulate, it comprises nickel, chromium, aluminium, cobalt and yittrium oxide, and a kind of braze metal powder, it mainly is made of nickel, chromium and silicon, the weight ratio scope of nominal spheres particulate and braze metal powder is approximately 2-3: 1, and a kind of volatility organic binder bond, it volatilizees when the enough height of temperature can melt said brazing metal and does not stay residue basically.
5. composition as claimed in claim 4 is characterized in that said weight rate is about 7: 3.
6. composition as claimed in claim 5 is characterized in that, said binding agent is based on acrylic acid series or polypropylene carbonic ester.
7. a manufacturing comprises the method for the heat exchanger of a vapo(u)rability heat transfer surface, comprising:
(a) heat exchange core assembly of assembling, it has at least two flow channels, be used for first flow channel of first heat-exchange fluid and be used for liquid is evaporated to second flow channel of the second gaseous state heat-exchange fluid, said core component comprises a plurality of adjacent but unconnected hardwares;
(b) before or after step (a) is finished, on at least one member of said second flow channel, applying a kind of composition, said composition comprises the nominal spheres fine-particle powder, it comprises nickel, chromium, aluminium, cobalt and yittrium oxide, a kind of braze metal powder, it mainly is made of nickel, chromium and silicon, and a kind of volatility organic binder bond, it volatilizees when the enough height of temperature can melt said braze metal powder and does not stay residue basically, and the weight ratio scope of nominal spheres particulate and braze metal powder is approximately 2-3: 1;
(c) this core component is placed under the soldering hot conditions, so that (i) fusing brazing metal and it is diffused in nominal spheres particulate and said at least one member, the binding agent that (ii) volatilizees is also removed its all residue basically, and (iii) said member soldering is become a bonded assembly.
8. method as claimed in claim 7 is characterized in that said weight rate is about 7: 3.
9. method as claimed in claim 7 is characterized in that, said binding agent is based on acrylic acid series or polypropylene carbonic ester.
10. a manufacturing comprises the method for the heat exchanger of a vapo(u)rability heat transfer surface, comprising:
(a) heat exchange core assembly of assembling, it has at least two flow channels, first flow channel that is used for first heat-exchange fluid, with second flow channel that is used for the second gaseous state heat-exchange fluid, a kind of liquid will be evaporated to this second gaseous state heat-exchange fluid, and said core component comprises a plurality of adjacent but unconnected hardwares;
(b) before or after step (a) is finished, on at least one member of said second flow channel, applying a kind of composition, said composition comprises a kind of nominal spheres metal particle and/or ceramic particle powder, a kind of braze metal powder and a kind of volatility organic binder bond, described organic binder bond volatilizees when the enough height of temperature can melt said brazing metal and does not stay residue basically, and the weight ratio scope of nominal spheres particulate and braze metal powder is approximately 2-3: 1;
(c) this core component is placed under the soldering hot conditions, so that (i) fusing brazing metal and it is diffused in nominal spheres particulate and said at least one member, the binding agent that (ii) volatilizees is also removed its all residue basically, and (iii) said member soldering is become a bonded assembly.
11. method as claimed in claim 10 is characterized in that, said braze metal powder mainly is nickel, chromium and silicon.
12. method as claimed in claim 10 is characterized in that, said nominal spheres particulate comprises nickel, chromium, aluminium, cobalt and yittrium oxide.
13. method as claimed in claim 10 is characterized in that, said binding agent is based on acrylic acid series or polypropylene carbonic ester.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/140,349 | 2002-05-07 | ||
| US10/140,349 US6568465B1 (en) | 2002-05-07 | 2002-05-07 | Evaporative hydrophilic surface for a heat exchanger, method of making the same and composition therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1522358A true CN1522358A (en) | 2004-08-18 |
| CN100365373C CN100365373C (en) | 2008-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038005638A Expired - Fee Related CN100365373C (en) | 2002-05-07 | 2003-04-25 | Evaporative hydrophilic surface for a heat exchanger, method of making the same and composition therefor |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US6568465B1 (en) |
| EP (1) | EP1502069B1 (en) |
| JP (1) | JP4242340B2 (en) |
| KR (1) | KR20040105683A (en) |
| CN (1) | CN100365373C (en) |
| AU (1) | AU2003234229A1 (en) |
| BR (1) | BR0304553A (en) |
| CA (1) | CA2451540A1 (en) |
| DE (1) | DE60326339D1 (en) |
| MX (1) | MXPA04000048A (en) |
| RU (1) | RU2004104336A (en) |
| TW (1) | TW200400345A (en) |
| WO (1) | WO2003095926A1 (en) |
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| CN101892905A (en) * | 2009-04-17 | 2010-11-24 | 通用电气公司 | The heat exchanger that has the surface treatment substrate |
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-
2002
- 2002-05-07 US US10/140,349 patent/US6568465B1/en not_active Expired - Fee Related
-
2003
- 2003-03-31 TW TW092107269A patent/TW200400345A/en unknown
- 2003-04-25 DE DE60326339T patent/DE60326339D1/en not_active Expired - Fee Related
- 2003-04-25 CN CNB038005638A patent/CN100365373C/en not_active Expired - Fee Related
- 2003-04-25 JP JP2004503878A patent/JP4242340B2/en not_active Expired - Fee Related
- 2003-04-25 RU RU2004104336/06A patent/RU2004104336A/en not_active Application Discontinuation
- 2003-04-25 AU AU2003234229A patent/AU2003234229A1/en not_active Abandoned
- 2003-04-25 WO PCT/US2003/012881 patent/WO2003095926A1/en active Search and Examination
- 2003-04-25 CA CA002451540A patent/CA2451540A1/en not_active Abandoned
- 2003-04-25 MX MXPA04000048A patent/MXPA04000048A/en not_active Application Discontinuation
- 2003-04-25 EP EP03728540A patent/EP1502069B1/en not_active Expired - Fee Related
- 2003-04-25 BR BR0304553-6A patent/BR0304553A/en not_active IP Right Cessation
- 2003-04-25 KR KR10-2004-7000589A patent/KR20040105683A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892905A (en) * | 2009-04-17 | 2010-11-24 | 通用电气公司 | The heat exchanger that has the surface treatment substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4242340B2 (en) | 2009-03-25 |
| KR20040105683A (en) | 2004-12-16 |
| BR0304553A (en) | 2004-08-03 |
| JP2005524822A (en) | 2005-08-18 |
| DE60326339D1 (en) | 2009-04-09 |
| RU2004104336A (en) | 2005-03-27 |
| EP1502069B1 (en) | 2009-02-25 |
| CN100365373C (en) | 2008-01-30 |
| US6568465B1 (en) | 2003-05-27 |
| EP1502069A1 (en) | 2005-02-02 |
| MXPA04000048A (en) | 2004-05-21 |
| WO2003095926A1 (en) | 2003-11-20 |
| AU2003234229A1 (en) | 2003-11-11 |
| TW200400345A (en) | 2004-01-01 |
| CA2451540A1 (en) | 2003-11-20 |
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